package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.entity.Employee;
import com.itheima.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /*
     * 员工登录
     */
    @PostMapping("/login")
    //登录成功后会存入session request对象可以get到session
    //RequestBody接受json对象 前端传的username password
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //1.md5加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));

        //2.查数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<Employee>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp =  employeeService.getOne(queryWrapper);

        //3.如果没查到返回失败
        if(emp == null) {
            return R.error("用户不存在");
        }

        //4.密码比对
        if(!emp.getPassword().equals(password)) {
            return R.error("密码错误");
        }

        //5.查看员工状态
        if(emp.getStatus() == 0) {
            return R.error("账号已禁用");
        }

        //6.登录成功
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);

    }

    /*
     * 员工退出
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清除Session中保存的当前登录员工的ID
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee) {
        log.info("新增员工,员工信息{}", employee.toString());

        //设置初始密码
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //更新用户
        Long empId = (Long)request.getSession().getAttribute("employee");

        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);
        employeeService.save(employee);
//        System.out.println(employee.getId());
        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page={},pageSize={},name={}",page,pageSize, name);
        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //添加过滤条件 name不是空才进行查询
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询 service继承了IService 重写Page方法
        employeeService.page(pageInfo, queryWrapper);
        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());

        Long empId = (Long)request.getSession().getAttribute("employee");
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(empId);
        employeeService.updateById(employee);

        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息...");
        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
